Different classes, so treat this as a step-up-or-not question rather than a head-to-head. The JBL Partybox 330 ranks #2 of 53 party speakers by sound quality at $629.95; the JBL Boombox 3 ranks #27 of 113 boombox speakers by sound quality at $349.95.
Why pick the JBL Partybox 330: A rolling party speaker with deep bass, a removable battery, a light show and inputs for mics and a guitar. It has a microphone input for karaoke or announcements, which the JBL Boombox 3 lacks. It has an adjustable EQ, which the JBL Boombox 3 lacks. The tradeoff: It remains very large and heavy, and the sound improvement over the JBL Partybox Stage 320 is modest rather than transformational.
The JBL Boombox 3 is the longer-running, lighter pick. A loud, fully waterproof boombox with a dedicated subwoofer, a 24 hour battery and power bank charging. It is rated for 24 hours of battery against 18 for the JBL Partybox 330. At 14.8 lbs (6.7 kg) it weighs much less than the JBL Partybox 330 at 37.7 lbs (17.1 kg). It is rated IP67 against IPX4 for the JBL Partybox 330. Watch for: Dips in mid bass range which makes the bass sound undefined, bass boosted, peaky at 700Hz, not quite as good mids and treble as the Blast.
Buy the JBL Partybox 330 at $629.95 for a party speaker, or the JBL Boombox 3 at $349.95 for a boombox speaker instead.
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Specifications Side By Side
| JBL Partybox 330 | JBL Boombox 3 | |
|---|---|---|
| Price | $629.95 | $349.95 |
| Ranked | #2 of 53 in Party Size Portable Bluetooth Speakers | #27 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Battery Life | 18 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Bluetooth Version | 6.0 | 5.3 |
| Charging Time | 3 hours | - |
| Drivers | 2x 6.5” (165mm) woofers + 2x 1” (25mm) PEN dome tweeters | 1x 189mm subwoofer + 2x 81mm woofers + 2x 20mm tweeters |
| EQ | Yes (Smart EQ mode) | No |
| Guitar Input | Yes | - |
| IP Rating | IPX4 | IP67 |
| Microphone Input | Yes (Karaoke mode with echo effect) | No |
| Inputs | Optical | - |
| Party Mode | Yes (Auracast) | Yes (PartyBoost up to 100 speakers) |
| Power Bank | Yes (USB-C, 5V/1A) | Yes (USB-A) |
| Power Input | AC Power cord | AC Power cable |
| Removable Battery | Yes | - |
| Stereo | Partially | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | No |
| Weight | 37.7 lbs (17.1 kg) | 14.8 lbs (6.7 kg) |
| Amplifier Power | 280W | 180W AC / 136W battery |
| Digital Aux Input | No | No |
| Lights | Yes | - |
| Wheels | Yes | - |
| Dimensions | 26.1”H x 13.1”W x 14.8”D (662.5 x 334 x 375 mm) | 19” x 10.1” x 7.9” (482 x 257 x 200 mm) |
| Strap | No | No |
| Aux Latency | - | 25ms |
| Bass Extension (-10dB) | - | 43Hz |
| Bluetooth Latency | - | 100ms |
| Maximum SPL | - | 110dB (measured by Alan Ross Reviews) |
| Built-in Microphone | - | No |
| FM Tuner | - | No |
| MicroSD Playback | - | No |
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